/Engine/Source/Runtime/RenderCore/Public/Shader.h
Encapsulates information about a shader's serialization behavior, used to detect when C++ serialization changes to auto-recompile.
class FSerializationHistory
TArray< uint32 ...
FullLengths
Full size length entries. One of these are used for every token with a value of 0.
int32
NumTokens
Number of tokens in TokenBits.
TArray< uint32 ...
TokenBits
Token stream stored as uint32's.